/* ==========================================
 * JGraphT : a free Java graph-theory library
 * ==========================================
 *
 * Project Info:  http://jgrapht.sourceforge.net/
 * Project Creator:  Barak Naveh (http://sourceforge.net/users/barak_naveh)
 *
 * (C) Copyright 2003-2006, by Barak Naveh and Contributors.
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; if not, write to the Free Software Foundation,
 * Inc.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
 */
/* ----------------------
 * JGraphAdapterDemo.java
 * ----------------------
 * (C) Copyright 2003-2006, by Barak Naveh and Contributors.
 *
 * Original Author:  Barak Naveh
 * Contributor(s):   -
 *
 * $Id: JGraphAdapterDemo.java,v 1.2 2007/05/22 15:52:59 kjellw Exp $
 *
 * Changes
 * -------
 * 03-Aug-2003 : Initial revision (BN);
 * 07-Nov-2003 : Adaptation to JGraph 3.0 (BN);
 *
 */
package org.jgrapht.demo;

import java.awt.*;
import java.awt.geom.*;

import javax.swing.*;

import org.jgraph.*;
import org.jgraph.graph.*;

import org.jgrapht.*;
import org.jgrapht.ext.*;
import org.jgrapht.graph.*;

// resolve ambiguity
import org.jgrapht.graph.DefaultEdge;

/**
 * A demo applet that shows how to use JGraph to visualize JGraphT graphs.
 * 
 * @author Barak Naveh
 * @since Aug 3, 2003
 */
public class JGraphAdapterDemo extends JApplet {
	// ~ Static fields/initializers
	// ---------------------------------------------

	private static final long serialVersionUID = 3256444702936019250L;

	private static final Color DEFAULT_BG_COLOR = Color.decode("#FAFBFF");

	private static final Dimension DEFAULT_SIZE = new Dimension(530, 320);

	// ~ Instance fields
	// --------------------------------------------------------

	//
	private JGraphModelAdapter jgAdapter;

	// ~ Methods
	// ----------------------------------------------------------------

	/**
	 * An alternative starting point for this demo, to also allow running this
	 * applet as an application.
	 * 
	 * @param args
	 *            ignored.
	 */
	public static void main(String[] args) {
		JGraphAdapterDemo applet = new JGraphAdapterDemo();
		applet.init();

		JFrame frame = new JFrame();
		frame.getContentPane().add(applet);
		frame.setTitle("JGraphT Adapter to JGraph Demo");
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.pack();
		frame.setVisible(true);
	}

	/**
	 * {@inheritDoc}
	 */
	public void init() {
		// create a JGraphT graph
		ListenableGraph<String, DefaultEdge> g = new ListenableDirectedMultigraph<String, DefaultEdge>(
				DefaultEdge.class);

		// create a visualization using JGraph, via an adapter
		jgAdapter = new JGraphModelAdapter<String, DefaultEdge>(g);

		JGraph jgraph = new JGraph(jgAdapter);

		adjustDisplaySettings(jgraph);
		getContentPane().add(jgraph);
		resize(DEFAULT_SIZE);

		String v1 = "v1";
		String v2 = "v2";
		String v3 = "v3";
		String v4 = "v4";

		// add some sample data (graph manipulated via JGraphT)
		g.addVertex(v1);
		g.addVertex(v2);
		g.addVertex(v3);
		g.addVertex(v4);

		g.addEdge(v1, v2);
		g.addEdge(v2, v3);
		g.addEdge(v3, v1);
		g.addEdge(v4, v3);

		// position vertices nicely within JGraph component
		positionVertexAt(v1, 130, 40);
		positionVertexAt(v2, 60, 200);
		positionVertexAt(v3, 310, 230);
		positionVertexAt(v4, 380, 70);

		// that's all there is to it!...
	}

	private void adjustDisplaySettings(JGraph jg) {
		jg.setPreferredSize(DEFAULT_SIZE);

		Color c = DEFAULT_BG_COLOR;
		String colorStr = null;

		try {
			colorStr = getParameter("bgcolor");
		} catch (Exception e) {
		}

		if (colorStr != null) {
			c = Color.decode(colorStr);
		}

		jg.setBackground(c);
	}

	@SuppressWarnings("unchecked")
	// FIXME hb 28-nov-05: See FIXME below
	private void positionVertexAt(Object vertex, int x, int y) {
		DefaultGraphCell cell = jgAdapter.getVertexCell(vertex);
		AttributeMap attr = cell.getAttributes();
		Rectangle2D bounds = GraphConstants.getBounds(attr);

		Rectangle2D newBounds = new Rectangle2D.Double(x, y, bounds.getWidth(),
				bounds.getHeight());

		GraphConstants.setBounds(attr, newBounds);

		// TODO: Clean up generics once JGraph goes generic
		AttributeMap cellAttr = new AttributeMap();
		cellAttr.put(cell, attr);
		jgAdapter.edit(cellAttr, null, null, null);
	}

	// ~ Inner Classes
	// ----------------------------------------------------------

	/**
	 * a listenable directed multigraph that allows loops and parallel edges.
	 */
	private static class ListenableDirectedMultigraph<V, E> extends
			DefaultListenableGraph<V, E> implements DirectedGraph<V, E> {
		private static final long serialVersionUID = 1L;

		ListenableDirectedMultigraph(Class<E> edgeClass) {
			super(new DirectedMultigraph<V, E>(edgeClass));
		}
	}
}

// End JGraphAdapterDemo.java
